/*
 * OREKIT-X
 * Copyright 2002-2008 CS Communication & Systemes
 * 
 * Parts of this software package have been licensed to CS
 * Communication & Systemes (CS) under one or more contributor license
 * agreements.  See the NOTICE file distributed with this work for
 * additional information.
 *  
 * This is an experimental copy of OREKIT from www.orekit.org.
 * Please use the original OREKIT from orekit.org for normal work
 * unrelated to this research project.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License.  You
 * may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.  See the License for the specific language governing
 * permissions and limitations under the License.
 */
package ore.frames;

/** 
 * Nutation correction (IAU 1980) parameters.
 * 
 * @author Pascal Parraud
 */
public class NutationCorrection
    extends Object
    implements java.io.Serializable
{

    /** 
     * Null correction (ddeps = 0, ddpsi = 0).
     */
    public static final NutationCorrection NULL_CORRECTION =
        new NutationCorrection(0, 0);


    /**
     * &delta;&Delta;&epsilon;<sub>1980</sub> parameter (radians).
     */
    public final double ddeps;
    /**
     * &delta;&Delta;&psi;<sub>1980</sub> parameter (radians).
     */
    public final double ddpsi;


    /** 
     * @param ddeps &delta;&Delta;&epsilon;<sub>1980</sub> parameter (radians)
     * @param ddpsi &delta;&Delta;&psi;<sub>1980</sub> parameter (radians)
     */
    public NutationCorrection(final double ddeps, final double ddpsi) {
        super();
        this.ddeps = ddeps;
        this.ddpsi = ddpsi;
    }


    /** 
     * @return &delta;&Delta;&epsilon;<sub>1980</sub> parameter
     */
    public double getDdeps() {
        return this.ddeps;
    }
    /** 
     * @return &delta;&Delta;&psi;<sub>1980</sub> parameter
     */
    public double getDdpsi() {
        return this.ddpsi;
    }
}
